Menus

I added a main menu as well as menus for checking the grade files and grading the individual homeworks.

All menus have help text functioning by default and the grad file checking menu and functionality is complete.

The main menu still needs to have statistics and consolidate files implemented, which I will get to at a later date. It also needs the grading homeworks menu and interface implemented, but I was leaving this for @rotestein.

I may have also snuck in a few fixes and corrections.